Traivs, you pass IMO. Your facial features make you appear to be quite a young guy, but I would read you as male.

Squirrel, I wouldn't second guess you as anything but male.

As for the board shorts, if you're worried about your packer but would like to get some board shorts, maybe look for a pair that are a bit bigger than what you'd normally wear in shorts (which will probably make them longer, too) and wear them over the bottoms of the swimsuit. That is, if you don't mind wearing a double layer to swim. Just a suggestion.